Senior Software Engineer, C++

Flow Traders is looking for Senior C++ Software Engineers to join our growing team in Amsterdam. Software Engineers at Flow Traders provide us with our competitive edge, equipping Researchers and Traders with the information and capabilities that they need to make sound business decisions. C++ plays a critical role in our event‑driven trading systems, which are designed to reliably handle vast amounts of data at ultra‑low latencies. As a C++ Engineer, you will build systems used to analyze and trade tens of thousands of products across hundreds of global trading venues every day. Working closely with Technologists, Quantitative Researchers, and Traders, you’ll guide the development of our in‑house trading technology and optimize it to achieve market‑leading performance and reliability. Our proprietary trading platform includes everything from venue connectivity (feed handlers and ordering gateways) to trading engines to shared platforms that enable us to work quickly and efficiently. We are proud of our open and collaborative culture, so you’ll have plenty of opportunity to find what fits you best. Teamwork is one of our most important firm values, and end users are never more than a short walk away, guaranteeing short feedback loops and immediate insight into the value that your code provides. To foster collaboration and innovation, we maintain shared libraries, encourage code re‑use, and continuously evolve our views on application architecture. What you will do For all C++ openings: Lead the development and global rollout of our Core platform used in multiple business/focus groups (Market data, Quantitative research, Pricing, Strategies) Be involved in the development process, which will be a fast‑paced iterative process where you deploy your deliverables and validate them yourself and/or together with traders or quants Develop tools/frameworks to deliver capabilities for tuning/develop data‑driven systematic pricing and trading strategies Work together with focus group engineers, Quants and Technical traders to refine requirements, collect feedback, and iterate on design and implementation of platform requirements Exchange Connectivity: Write software that communicates with exchanges through their APIs, receiving market data and sending orders over the network in different protocols, such as FIX, Websocket or requests Ensure quality of software based on a set of testing suites, which you are expected to use, maintain and extend Optimize exchange communication through kernel bypass, optimizing TLS or the connection handling to an exchange Research exchange behavior in detail to align our behavior to that of an exchange Implement these solutions using the provided exchange SDKs in different languages such as C++, Rust, Python, Typescript Trading Strategies: Implement trading algorithms based on requirements provided by traders and quants Acquire and develop the necessary trading knowledge to successfully translate the requirements into actual software implementation Continuously improve the stability, reliability, and performance of the trading engine Enhance monitoring and observability in collaboration with the Trading Operations team Investigate and resolve production issues such as crashes, unexpected business logic behavior, and performance bottlenecks Prepare for releases and deployments of new trading engine versions What you need to succeed BSc, MSc, or PhD in Computer Science, Mathematics or equivalent 5+ years post‑graduation professional C++ software development experience (proprietary trading industry preferred) Ability to write clean, reliable, and highly scalable code Good knowledge of algorithms and data structures Experience in parallel, asynchronous, and multithreaded programming Interest in achieving maximum performance from available hardware and software Ability to communicate with technical and non‑technical business colleagues At Flow Traders, we acknowledge the importance of open and transparent communication whether it be with our employees, our stakeholders, or our local and global communities. When it comes to salary, Flow Traders uses reliable market research to create base ranges. Where candidates will fall within the range depends on a few different factors including but not limited to level of experience, location, and specific skill set. We also consider ourselves one global team, and to demonstrate that, all employees are eligible to share in the company’s success through an annual discretionary variable remuneration allocated based on company, group and individual performance and contribution. Per NYC salary transparency law, the total compensation for this role includes a base range of $185,000 to $225,000 plus annual discretionary variable remuneration. Equal Employment Opportunity As set forth in Flow Traders’s Equal Employment Opportunity policy, we do not discriminate on the basis of any protected group status under any applicable law. Voluntary Self‑Identification of Disability We are a federal contractor or subcontractor. The law requires us to provide equal employment opportunity to qualified people with disabilities. We have a goal of having at least 7% of our workers as people with disabilities. The law says we must measure our progress toward this goal. To do this, we must ask applicants and employees if they have a disability or have ever had one. People can become disabled, so we need to ask this question at least every five years. Completing this form is voluntary, and we hope that you will choose to do so. Your answer is confidential. No one who makes hiring decisions will see it. Your decision to complete the form and your answer will not harm you in any way. If you want to learn more about the law or this form, visit the U.S. Department of Labor’s Office of Federal Contract Compliance Programs (OFCCP) website at How do you know if you have a disability? A disability is a condition that substantially limits one or more of your “major life activities.” If you have or have ever had such a condition, you are a person with a disability. Disabilities include, but are not limited to: Alcohol or other substance use disorder (not currently using drugs illegally) Autoimmune disorders, for example, lupus, fibromyalgia, rheumatoid arthritis, HIV/AIDS Blind or low vision Cancer (past or present) Cardiovascular or heart disease Celiac disease Cerebral palsy Deaf or serious difficulty hearing Diabetes Disfigurement, for example, disfigurement caused by burns, wounds, accidents, or congenital disorders Epilepsy or other seizure disorder Gastrointestinal disorders, for example, Crohn's Disease, irritable bowel syndrome Intellectual or developmental disability Mental health conditions, for example, depression, bipolar disorder, anxiety disorder, schizophrenia, PTSD Missing limbs or partially missing limbs Mobility impairment, benefiting from the use of a wheelchair, scooter, walker, leg brace(s) and/or other supports Nervous system condition, for example, migraine headaches, Parkinson’s disease, multiple sclerosis (MS) Neurodivergence, for example, attention‑deficit/hyperactivity disorder (ADHD), autism spectrum disorder, dyslexia, dyspraxia, other learning disabilities Partial or complete paralysis (any cause) Pulmonary or respiratory conditions, for example, tuberculosis, asthma, emphysema Short stature (dwarfism) Traumatic brain injury PUBLIC BURDEN STATEMENT: According to the Paperwork Reduction Act of 1995 no persons are required to respond to a collection of information unless such collection displays a valid OMB control number. This survey should take about 5 minutes to complete. We use Greenhouse’s AI‑powered Talent Matching tool to help compare applications against the requirements of the role. This technology is used solely to support the recruitment process by highlighting potentially relevant skills and experience. The tool does not make hiring or screening decisions on behalf of Flow Traders. All applications and CVs are reviewed by members of our recruitment team, and all hiring decisions are made by humans. #J-18808-Ljbffr